Im building a rc tug but I have no idea what type of motor I should use to power it.
The tug doesnt have to be fast,(want to have scale speed) but it must have quite a bit of power.
I'll be using a 3 blade prop with a shallow pitch (robbe 50mm 3 blade prop). What rpm should the motor have to use a prop like that effectivly? The motor must be direct drive.
Tug is +-70cm long and quite heavy.

I have always had good luck with Dumas Pittman motors #2204 12volt or 2005 6volt. They turn slow so your tug won't plane, have good torque, and low amp draw (less than 2 amps). All my tugs are direct drive. Never had a heat problem even when running in weeds. These motors are not cheap but my oldest one is from 1979.

Hello everyone
I've found 2 suitable motors.
The one is a 65t rc crawler and the other is a 80t rc crawler motor.
The 65t no load rpm at 7.2v is 7000rpm
the 80t no load rpm at 7.2v is 5500rpm
So which one would be better suited for my tug? (im assuming the 80t because of lower rpm?)
What would the ideal max prop rpm be for a scale tug?
Thanks

Should have looked at the OP more carefully
You will want to spin that prop at around 4500-5000 rpm at full throttle, this RPM will be about 75 % of no load speed of the motor under Ideal circumstances

So let me get this correct Lambsy
so at 7.2 volts the 80 turn crawler motor is going to be better, 6 volts for the 55 turn motor for the same performance?

I know for a fact that a 40 mm prop at 6 volts and 6000 rpm is about 25 watts input power